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OPTIMOD-FM DIGITAL
A/D (or A to D)
analog-to-digital converter
AES
Audio Engineering Society
AGC
automatic gain control
A-I
analog input
A-O
analog output
BAL
balanced (refers to an audio connection with two active conductors and one shield sur-
rounding them).
BBC
British Broadcasting Corporation
BNC
a type of RF connector
CALIB
calibrate
CIT
composite isolation transformer
CMOS
complementary metal-oxide semiconductor
Coded Orthogonal Frequency Division Multiplex — a robust type of digital modulation using
COFDM
many narrow-bandwidth, low data rate, mutually non-interfering carriers to achieve an ag-
gregate high data rate with excellent multipath rejection.
COM
serial data communications port
D/A (or D to A)
digital-to-analog converter
dBm
decibel power measurement. 0 dBm = 1mW applied to a specified load. In audio, the load
is usually 600. In this case only, 0 dBm = 0.775V rms.
decibel voltage measurement. 0 dBu = 0.775V RMS. For this application, the dBm-into-
dBu
600 scale on voltmeters can be read as if it were calibrated in dBu.
DI
digital input
DJ
disk jockey, an announcer who plays records in a club or on the air
DO
digital output
DOS
Microsoft disk operating system for IBM-compatible PC
DSP
digital signal processor (or processing). May also refer to a special type of microprocessor
optimized for efficiently executing arithmetic.
EBU
European Broadcasting Union
EBS
Emergency Broadcasting System (U.S.A.)
EMI
electromagnetic interference
ESC
escape
FCC
Federal Communications Commission (USA regulatory agency)
6-13
TECHNICAL DATA
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